What is CVE-2021-35327?

CVE-2021-35327 is a critical-severity vulnerability in Totolink A720r, classified under Missing Authorization. CVSS score: 9.8/10. Published 2021-08-05.

How severe is CVE-2021-35327?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-35327 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Totolink A720r

CVE-2021-35327

A vulnerability in TOTOLINK A720R A720R_Firmware v4.1.5cu.470_B20200911 allows attackers to start the Telnet service, then login with the default credentials via a crafted POST request.

Vulnerability class: Broken Access Control

EPSS: 0.014 (68.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Totolink A720r
Totolink A720r_firmware — versions 4.1.5cu.470_b20200911
N/a — versions n/a

Weakness classification (CWE)

CWE-862 — Missing Authorization

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-35327?: CVE-2021-35327 is a critical-severity vulnerability in Totolink A720r, classified under Missing Authorization. CVSS score: 9.8/10. Published 2021-08-05.
How severe is CVE-2021-35327?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-35327 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.